Residential Construction Academy: House Wiring (MindTap Course List)
5th Edition
ISBN: 9781337402415
Author: Gregory W Fletcher
Publisher: Cengage Learning
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Chapter 20, Problem 3RQ
To determine
The probable cause of the different indication of tester between different slots.
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A square column foundation has to carry a gross allowable load of 2005 kN (FS = 3). Given: D₤ = 1.7 m, y = 15.9 kN/m³, 0' = 34°, and c' = 0. Use Terzaghi's equation to determine the size of the foundation (B). Assume general shear failure. For o' = 34°, N₁
36.5 and Ny = 38.04.
(Enter your answer to three significant figures.)
B=2.16
m
For the design of a shallow foundation, given the following:
Soil: ' = 20°
c=57 kN/m²
Unit weight, y=18 kN/m³
Modulus of elasticity, E, = 1400 kN/m²
Poisson's ratio, μs = 0.35
Foundation: L=2m
B=1m
D₁ =1m
Calculate the ultimate bearing capacity. Use the equation:
1
qu= c'Ne Fes Fed Fec +qNqFqs FqdFqc + - BNF √s F√d F
2
For d'=20°, N = 14.83, N = 6.4, and N., = 5.39.
(Enter your answer to three significant figures.)
qu
kN/m²
1.0 m
(Eccentricity
in one direction
only) = 0.15 m
Qall
= 0
1.5 m x 1.5 m
Centerline
An eccentrically loaded foundation is shown in the figure above. Use FS of 4 and determine the maximum allowable load that the foundation can carry if y = 16 kN/m³ and ' = 35°. Use Meyerhof's effective area method.
For o' = 35°, N₁ = 33.30 and Ny = 48.03.
(Enter your answer to three significant figures.)
Qall
kN
Chapter 20 Solutions
Residential Construction Academy: House Wiring (MindTap Course List)
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